The system is completely new from stem to stern, never had any fluid in it at all. Initially, I pumped the brakes, then bled each side of the master cylinder. Then, normal procedure was followed. pump them up and hold them, open the bleeder, then no drop in pedal, no fluid, no air bubbles, then tighten the bleeder back up. I used a tightly fitting rubber hose on the bleeder, with the other end submerged in fluid inside a glass jar to see if any bubbles came out. We tried for at least 30 sequences on the longest run, then I did the other rear with nothing there either. At that time I switched to the front calipers and they bled out fine. Went back to the rears and still nothing. Thats what got me hung up. Doesnt the equalizer have some kinda piston in it? I figured it is a pressure balance system like a tub/shower valve but alas I am a plumber and think along those lines. I dunno, I am kinda stumped. <img src="/forums/images/graemlins/notooth.gif" alt="" />